Long term reviews of Chorus 12 speed versus 11?

[slowpoke]

Much to my chagrin, 11 speed Chorus (used, or NOS) is somehow more expensive than 12 speed Chorus new. I thought "obsolete" technology would be cheaper!

With that in mind, is there any reason not to go to twelve, especially in 2020? The freehub is still the same going from 10 to 12. And I have access to less-expensive replacement parts if I smash my derailleur. I do wish the 11-34 was a 12-34, but that's roadie-culture.

(Please, no Ekar discussions given its availability and price.)